[a] His father was Francis Englehart (died 1773), a German plaster modeller who emigrated to England as a child; his mother was Anne Dawney.
He married his first wife, Elizabeth Brown, in 1776; and the couple set up house in Prince's Street, Hanover Square, London.
He married his second wife, Ursula Sarah Browne in 1785; and the couple had four children: George, Nathaniel, Harry and Emma.
He had built the house on land he purchased in 1783, and the interiors are said to have been decorated in the fashionable neo-classical style of Robert Adam.
His second wife, Ursula, died in 1817, and Engleheart soon after gave up the house and went to live with his son Nathaniel in Blackheath, then a village to the southeast of London.
Miniaturists at this time were still learning to exploit the full potential of ivory, and were struggling to find ways of adhering the watercolour to its greasy surface.
His works are easily recognisable: he often portrays his sitters with deep eyes under strong eyebrows, together with a slightly lengthened nose, and the flesh colour of the face is painted using a brownish yellow tone.
Engleheart imbues his sitters with a sense of gentleness, elegance and serenity; even his military officers look more at home in the drawing room than the battlefield.
Men tended to dress like country squires: often wearing a plain navy blue or brown coat, with a white high-collared shirt and white cravat; their hair was brushed forward (imitating the style worn by the ancient Romans) and sometimes markedly pushed up vertically off the forehead.
Engleheart painted George III twenty-five times, and had a very extensive circle of patrons, comprising nearly all the important persons connected with the court.